The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Oct. 17, 2019
Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co., Ltd., Suzhou, CN;
Zhangjiagang Rongsheng Special Steel Co., Ltd., Suzhou, CN;
Jiangsu Shagang Group Co., Ltd., Suzhou, CN;
Changdong Zou, Suzhou, CN;
Han Ma, Suzhou, CN;
Jiaqi Zhao, Suzhou, CN;
Kui Shen, Suzhou, CN;
Xiaofeng Cai, Suzhou, CN;
Yixin Shi, Suzhou, CN;
Yonglin Huang, Suzhou, CN;
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD., Suzhou, CN;
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO., LTD., Suzhou, CN;
JIANGSU SHAGANG GROUP CO., LTD., Suzhou, CN;
Abstract
The present invention discloses a wire rod for an ultrahigh-strength steel cord and a manufacturing method thereof. The manufacturing method includes: smelting molten steel where inclusions in sizes ≥5 μm are at a number density ≤0.5/mmand sizes of inclusions are ≤30 μm; casting the molten steel into an ingot blank with a center carbon segregation value of 0.92-1.08; cogging the ingot blank into an intermediate blank with a center carbon segregation value of 0.95-1.05; rolling the intermediate blank into a wire rod; and performing temperature control cooling on the wire rod to obtain a wire rod with high purity, high homogeneity and tensile strength ≤1,150 MPa. The wire rod may be used for an ultrahigh-strength steel cord with single tensile strength ≥3,600 MPa.